US7036484B2 - Idle speed control using alternator - Google Patents

Idle speed control using alternator Download PDF

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Publication number
US7036484B2
US7036484B2 US10/414,702 US41470203A US7036484B2 US 7036484 B2 US7036484 B2 US 7036484B2 US 41470203 A US41470203 A US 41470203A US 7036484 B2 US7036484 B2 US 7036484B2
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United States
Prior art keywords
engine
load
alternator
idle speed
decrease
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Expired - Fee Related
Application number
US10/414,702
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English (en)
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US20040206332A1 (en
Inventor
David S. Mathews
Nick S. Kapsokavathis
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
GM Global Technology Operations LLC
Original Assignee
Motors Liquidation Co
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Priority to US10/414,702 priority Critical patent/US7036484B2/en
Assigned to GENERAL MOTORS CORPORATION reassignment GENERAL MOTORS CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: KAPSOKAVATHIS, NICK S., MATTHEWS, DAVID S.
Priority to DE102004017503.9A priority patent/DE102004017503B4/de
Publication of US20040206332A1 publication Critical patent/US20040206332A1/en
Application granted granted Critical
Publication of US7036484B2 publication Critical patent/US7036484B2/en
Assigned to GM GLOBAL TECHNOLOGY OPERATIONS, INC. reassignment GM GLOBAL TECHNOLOGY OPERATIONS, INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: GENERAL MOTORS CORPORATION
Assigned to UNITED STATES DEPARTMENT OF THE TREASURY reassignment UNITED STATES DEPARTMENT OF THE TREASURY SECURITY AGREEMENT Assignors: GM GLOBAL TECHNOLOGY OPERATIONS, INC.
Assigned to CITICORP USA, INC. AS AGENT FOR BANK PRIORITY SECURED PARTIES, CITICORP USA, INC. AS AGENT FOR HEDGE PRIORITY SECURED PARTIES reassignment CITICORP USA, INC. AS AGENT FOR BANK PRIORITY SECURED PARTIES SECURITY AGREEMENT Assignors: GM GLOBAL TECHNOLOGY OPERATIONS, INC.
Assigned to GM GLOBAL TECHNOLOGY OPERATIONS, INC. reassignment GM GLOBAL TECHNOLOGY OPERATIONS, INC. RELEASE BY SECURED PARTY (SEE DOCUMENT FOR DETAILS). Assignors: UNITED STATES DEPARTMENT OF THE TREASURY
Assigned to GM GLOBAL TECHNOLOGY OPERATIONS, INC. reassignment GM GLOBAL TECHNOLOGY OPERATIONS, INC. RELEASE BY SECURED PARTY (SEE DOCUMENT FOR DETAILS). Assignors: CITICORP USA, INC. AS AGENT FOR BANK PRIORITY SECURED PARTIES, CITICORP USA, INC. AS AGENT FOR HEDGE PRIORITY SECURED PARTIES
Assigned to UNITED STATES DEPARTMENT OF THE TREASURY reassignment UNITED STATES DEPARTMENT OF THE TREASURY SECURITY AGREEMENT Assignors: GM GLOBAL TECHNOLOGY OPERATIONS, INC.
Assigned to UAW RETIREE MEDICAL BENEFITS TRUST reassignment UAW RETIREE MEDICAL BENEFITS TRUST SECURITY AGREEMENT Assignors: GM GLOBAL TECHNOLOGY OPERATIONS, INC.
Assigned to GM GLOBAL TECHNOLOGY OPERATIONS, INC. reassignment GM GLOBAL TECHNOLOGY OPERATIONS, INC. RELEASE BY SECURED PARTY (SEE DOCUMENT FOR DETAILS). Assignors: UAW RETIREE MEDICAL BENEFITS TRUST
Assigned to GM GLOBAL TECHNOLOGY OPERATIONS, INC. reassignment GM GLOBAL TECHNOLOGY OPERATIONS, INC. RELEASE BY SECURED PARTY (SEE DOCUMENT FOR DETAILS). Assignors: UNITED STATES DEPARTMENT OF THE TREASURY
Assigned to WILMINGTON TRUST COMPANY reassignment WILMINGTON TRUST COMPANY SECURITY AGREEMENT Assignors: GM GLOBAL TECHNOLOGY OPERATIONS, INC.
Assigned to GM Global Technology Operations LLC reassignment GM Global Technology Operations LLC CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). Assignors: GM GLOBAL TECHNOLOGY OPERATIONS, INC.
Assigned to GM Global Technology Operations LLC reassignment GM Global Technology Operations LLC RELEASE BY SECURED PARTY (SEE DOCUMENT FOR DETAILS). Assignors: WILMINGTON TRUST COMPANY
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/04—Introducing corrections for particular operating conditions
    • F02D41/08—Introducing corrections for particular operating conditions for idling
    • F02D41/083—Introducing corrections for particular operating conditions for idling taking into account engine load variation, e.g. air-conditionning
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D31/00—Use of speed-sensing governors to control combustion engines, not otherwise provided for
    • F02D31/001—Electric control of rotation speed
    • F02D31/002—Electric control of rotation speed controlling air supply
    • F02D31/003—Electric control of rotation speed controlling air supply for idle speed control
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2710/00—Output or target parameters relating to a particular sub-units
    • B60W2710/06—Combustion engines, Gas turbines
    • B60W2710/0644—Engine speed
    • B60W2710/065—Idle condition

Definitions

  • the present invention relates to engine idle speed control, and more particularly to using an alternator to achieve engine idle speed control.
  • Vehicle engines provide power for a plurality of external loads such as an alternator, an A/C compressor, a power steering pump, a hydraulic pump, etc.
  • loads such as an alternator, an A/C compressor, a power steering pump, a hydraulic pump, etc.
  • the engine increases power output to maintain driving power, which is noticeable when the engine is idling.
  • a noticeable dip in engine idle speed occurs when engine power is used to drive the load, which is undesirable.
  • Spark advance provides a fast acting engine torque actuator that compensates for the reduced engine power and maintains constant speed. During idle, spark advance causes the engine to be less efficient. Additionally, combustion instabilities occur and difficulties are presented in misfire calibration.
  • the present invention provides an engine system having an engine, an alternator, a load, and a controller.
  • the controller communicates with the engine, the alternator, and the load.
  • the controller signals the engine to drive the alternator when the engine idles.
  • the controller detects a load increase on the engine, the controller reduces a load of the alternator on the engine to maintain an idle speed of the engine.
  • the controller adjusts air flow into the engine to compensate for the load increase and concurrently increases the alternator load.
  • the controller when the controller detects a load decrease on the engine, the controller increases the alternator load to compensate for the load decrease. Further, the controller adjusts the air flow into the engine while decreasing the alternator load to maintain the idle speed of the engine.
  • the controller when the controller detects a load decrease on the engine, the controller adjusts spark timing of the engine to compensate for the load decrease to maintain the idle speed of the engine.
  • FIG. 1 is a functional block diagram of an engine system
  • FIG. 2 is a flowchart detailing an engine idle speed control method according to the present invention.
  • FIG. 3 is a graph detailing the engine idle speed control method.
  • the engine system 10 includes an engine 12 and an intake manifold 14 . Air is directed into the cylinders (not shown) of the engine 12 through the intake manifold 14 .
  • a throttle 18 controls the mass of air flowing to the intake manifold 14 .
  • the throttle 18 can be adjusted directly by an accelerator pedal or by an electronic throttle controller and the accelerator pedal.
  • An alternator 20 is selectively driven by the engine 12 to charge a battery 22 .
  • the engine 12 provides power to one or more loads 24 .
  • the load 24 represents one or more engine-driven loads including, but not limited to, an air conditioning compressor, a power steering pump, transmission pump, and the like.
  • a controller 26 communicates with the throttle 18 , the engine 12 , the alternator 20 , and the load 24 .
  • the controller 26 executes an engine idle speed control algorithm, as will be discussed in further detail below.
  • control determines whether an idle condition of the engine 12 is detected in step 100 . If an idle condition is not detected, control loops back to step 100 . If an idle condition is detected, control signals an increase in the alternator load on the engine 12 in step 102 . In step 104 , the engine 12 operates at the increased alternator load.
  • control checks whether the idle condition is still present. If not, control operates the alternator 20 at a standard load in step 108 and controls ends.
  • the standard load reflects the load required to maintain a charge level of the battery 22 .
  • the standard load is determined by a conventional battery charge algorithm. If the idle condition is still present, control determines whether there is an increased load on the engine 12 in step 110 . An increased load on the engine 12 occurs when the load 24 is driven by the engine 12 . If there is no load increase on the engine 12 , control continues with step 112 . If there is an increased load on the engine 12 , control continues with step 114 where the alternator load is decreased to compensate for the load increase.
  • the air intake into the engine 12 , and the alternator load are increased in steps 116 and 118 , respectively.
  • the increased air intake increases the engine idle speed.
  • the concurrent increase in alternator load which would otherwise decrease the engine idle speed, maintains the engine idle speed at a substantially constant value.
  • the alternator load is increased to the level prior to the decrease in step 114 .
  • step 112 the algorithm determines whether there is a load decrease on the engine 12 . If there is no load decrease, control loops back to step 104 . If a load decrease is detected, control continues with step 120 , where, in accordance with one embodiment of the present invention, the alternator load is increased. In this manner, the alternator load compensates for the decreased load, and maintains engine idle speed. Once the alternator load has been increased, the air intake into the engine is decreased, and the alternator load is decreased in steps 122 and 124 , respectively. The decreased air intake decreases the engine idle speed. The concurrent decrease in alternator load, which would otherwise increase the engine idle speed, enables the engine idle speed to remain constant.
  • spark timing of the engine 12 is adjusted to compensate for the decreased load to maintain the engine idle speed.
  • FIG. 3 depicts the engine idle speed, air intake, alternator load, and accessory load as a function of time.
  • the engine idle speed remains static until time t 1 , when the load 24 is switched on.
  • the alternator load immediately decreases, and compensates for the load 24 .
  • the air intake and alternator load are increased until the alternator load achieves the prior (pre-t 1 ) level.
  • the engine idle speed remains static.
  • the load 24 is turned off and the alternator load immediately increases to compensate for the decreased load.
  • the air intake is decreased and the alternator load decreases, until the alternator load achieves its pre-t 3 level.
  • the engine idle speed remains constant.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
  • Electrical Control Of Ignition Timing (AREA)
  • Control Of Vehicle Engines Or Engines For Specific Uses (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)
US10/414,702 2003-04-16 2003-04-16 Idle speed control using alternator Expired - Fee Related US7036484B2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US10/414,702 US7036484B2 (en) 2003-04-16 2003-04-16 Idle speed control using alternator
DE102004017503.9A DE102004017503B4 (de) 2003-04-16 2004-04-08 Leerlaufdrehzahlregelung unter Verwendung einer Lichtmaschine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US10/414,702 US7036484B2 (en) 2003-04-16 2003-04-16 Idle speed control using alternator

Publications (2)

Publication Number Publication Date
US20040206332A1 US20040206332A1 (en) 2004-10-21
US7036484B2 true US7036484B2 (en) 2006-05-02

Family

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US10/414,702 Expired - Fee Related US7036484B2 (en) 2003-04-16 2003-04-16 Idle speed control using alternator

Country Status (2)

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US (1) US7036484B2 (de)
DE (1) DE102004017503B4 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070227499A1 (en) * 2006-04-04 2007-10-04 Denso Corporation Electric power generation control system
KR100952869B1 (ko) 2005-05-23 2010-04-13 도요타 지도샤（주） 내연기관용 제어 장치
US9893664B2 (en) 2015-05-01 2018-02-13 Ford Global Technologies, Llc Methods and systems for efficient engine torque control
US10128784B2 (en) * 2016-04-27 2018-11-13 Ford Global Technologies, Llc Alternator charging based on marginal fuel cost

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7165530B2 (en) * 2005-06-01 2007-01-23 Caterpillar Inc Method for controlling a variable-speed engine
US7335131B2 (en) * 2005-07-22 2008-02-26 Ford Global Technologies, Llc Vehicle and method for controlling an engine in a vehicle
US7290525B1 (en) * 2006-10-27 2007-11-06 Gm Global Technology Operations, Inc. Methods and apparatus for an engine speed controller using generator torque load
US7868592B2 (en) 2007-12-10 2011-01-11 Visteon Global Technologies, Inc. Method of automotive electrical bus management
CN103291483B (zh) * 2013-05-21 2016-07-06 潍柴动力股份有限公司 负载突增防熄火方法、装置和使用该装置的电控发动机
WO2018138762A1 (ja) * 2017-01-24 2018-08-02 日産自動車株式会社 車両の制御方法及び車両の制御装置

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4520272A (en) * 1982-01-30 1985-05-28 Mitsubishi Jidosha Kogyo Kabushiki Kaisha Engine speed regulating system
JPH03222825A (ja) * 1990-01-27 1991-10-01 Hitachi Ltd 車体振動低減装置
US5111788A (en) * 1990-01-12 1992-05-12 Mitsubishi Denki K.K. Rotation speed control device of an internal combustion engine
US5712786A (en) * 1993-10-12 1998-01-27 Mitsubishi Jidosha Kogyo Kabushiki Kaisha Idling speed control method and apparatus for an internal combustion engine
US6109237A (en) * 1997-02-04 2000-08-29 Isad Electronic Systems Gmbh & Co. Kg Apparatus for controlling the idling speed of an internal combustion engine
US6378492B1 (en) * 1999-09-30 2002-04-30 Siemens Automotive Corporation Idle control for internal combustion engine

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0654463A (ja) * 1992-07-29 1994-02-25 Mitsubishi Electric Corp 車両用電子制御装置
US5765371A (en) * 1995-12-08 1998-06-16 Toyota Jidosha Kabushiki Kaisha Apparatus for controlling internal combustion engine having electrically heated catalyst

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4520272A (en) * 1982-01-30 1985-05-28 Mitsubishi Jidosha Kogyo Kabushiki Kaisha Engine speed regulating system
US5111788A (en) * 1990-01-12 1992-05-12 Mitsubishi Denki K.K. Rotation speed control device of an internal combustion engine
JPH03222825A (ja) * 1990-01-27 1991-10-01 Hitachi Ltd 車体振動低減装置
US5712786A (en) * 1993-10-12 1998-01-27 Mitsubishi Jidosha Kogyo Kabushiki Kaisha Idling speed control method and apparatus for an internal combustion engine
US6109237A (en) * 1997-02-04 2000-08-29 Isad Electronic Systems Gmbh & Co. Kg Apparatus for controlling the idling speed of an internal combustion engine
US6378492B1 (en) * 1999-09-30 2002-04-30 Siemens Automotive Corporation Idle control for internal combustion engine

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100952869B1 (ko) 2005-05-23 2010-04-13 도요타 지도샤（주） 내연기관용 제어 장치
US20070227499A1 (en) * 2006-04-04 2007-10-04 Denso Corporation Electric power generation control system
US7373919B2 (en) * 2006-04-04 2008-05-20 Denso Corporation Electric power generation control system
US9893664B2 (en) 2015-05-01 2018-02-13 Ford Global Technologies, Llc Methods and systems for efficient engine torque control
US10243494B2 (en) 2015-05-01 2019-03-26 Ford Global Technologies, Llc Methods and systems for efficient engine torque control
US10128784B2 (en) * 2016-04-27 2018-11-13 Ford Global Technologies, Llc Alternator charging based on marginal fuel cost
RU2692862C2 (ru) * 2016-04-27 2019-06-28 Форд Глобал Текнолоджиз, Ллк Регулирование зарядки от генератора с учетом добавочного расхода топлива

Also Published As

Publication number Publication date
DE102004017503B4 (de) 2016-11-10
US20040206332A1 (en) 2004-10-21
DE102004017503A1 (de) 2004-11-11

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